the jamovi source code is released under the AGPL3, with some components released under the GPL2+ (the AGPL3 and GPL2+ are compatible, so there's no problem mixing these components).
| component | license |
|---|---|
| jamovi/electron/ | AGPL3 |
| jamovi/client/ | AGPL3 |
| jamovi/server/ | AGPL3 |
| jamovi/server/jamovi/common/ | GPL2+ |
| jamovi/engine/ | GPL2+ |
the analyses in jamovi are a separate project: jmv, and are released under the GPL2+.